01 - Identical twins Sharon McKendrick and Susan Evers (Hayley Mills) meet at Miss Inch's Summer Camp for Girls, unaware that they are sisters. Their identical appearance initially creates rivalry, and they pull pranks on each other, culminating in the camp dance being ruined. As punishment, Miss Inch decides that they must live together in the isolated "Serendipity" cabin (and eat together at an "Isolation Table") for the remainder of the camp season. After discovering that they both come from single-parent homes, they soon realize they are twin sisters and that their parents, Mitchell "Mitch" Evers (Brian Keith) and Margaret "Maggie" McKendrick (Maureen O'Hara), divorced shortly after their birth, with each parent having custody of one of them. The twins, each eager to meet the parent she never knew, decide to switch places. Susan gives Sharon a matching haircut and teaches her how to her bite her nails, and they also take a crash-course getting to know each other's personalities and character traits so as to fool the parents.



02 - In this update of a 1961 film, twins Annie and Hallie (Lindsay Lohan) are strangers until happenstance unites them. The preteen girls' divorced parents, Nick (Dennis Quaid) and Elizabeth (Natasha Richardson), are living on opposite sides of the Atlantic, each with one child. After meeting at camp, American Hallie and British-raised Annie engineer an identity swap, giving both the chance to spend time with the parent they've missed. If the scheme works, it might just make the family whole again.